<template>
  <div class="bigbox">
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="isAll" />
            <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <tr v-for="(item, index) in goodList" :key="index">
          <input type="checkbox" v-model="item.checked" />
          <td>{{ item.name }}</td>
          <td>{{ item.price }}</td>

          <td>
            <button @click="delbtn(item)">-</button>{{ item.num }}
            <button @click="addbtn(item)">+</button>
          </td>

          <td>{{ item.price * item.num }}</td>
          <button @click="delet(index)">删除</button>
        </tr>
      </tbody>
      <tfoot>
        <tr>
          <td>合计:{{ sum }}</td>
          <td colspan="5"></td>
        </tr>
      </tfoot>
    </table>
  </div>
</template>

<script>
import { mapState, mapActions, mapGetters, mapMutations } from 'vuex'

export default {
  computed: {
    // 数据
    ...mapState(['goodList']),
    // 合计
    ...mapGetters(['sum']),
    // 单选，全选框
    isAll: {
      get() {
        return this.goodList.every((item) => item.checked)
      },
      set(val) {
        this.goodList.forEach((item) => (item.checked = val))
      },
    },
  },
  methods: {
    // 所有事件
    ...mapMutations(['addbtn', 'delbtn', 'delet', 'checs', 'btns']),
  },
}
</script>

<style></style>
